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Subject[PATCH] Enable /proc/diskstats for /dev/ramX
From
Date
Signed-off-by: Ryo Onodera <ryoqun@gmail.com>
---
drivers/block/brd.c | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/drivers/block/brd.c b/drivers/block/brd.c
index 531ceb3..181b2d7 100644
--- a/drivers/block/brd.c
+++ b/drivers/block/brd.c
@@ -332,6 +332,7 @@ static void brd_make_request(struct request_queue *q, struct bio *bio)
sector_t sector;
int i;
int err = -EIO;
+ int cpu;

sector = bio->bi_sector;
if (sector + (bio->bi_size >> SECTOR_SHIFT) >
@@ -348,6 +349,12 @@ static void brd_make_request(struct request_queue *q, struct bio *bio)
if (rw == READA)
rw = READ;

+ cpu = part_stat_lock();
+ part_stat_inc(cpu, &brd->brd_disk->part0, ios[rw]);
+ part_stat_add(cpu, &brd->brd_disk->part0, sectors[rw],
+ bio_sectors(bio));
+ part_stat_unlock();
+
bio_for_each_segment(bvec, bio, i) {
unsigned int len = bvec->bv_len;
err = brd_do_bvec(brd, bvec->bv_page, len,
--
1.7.9.5




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